Image Processing System, Image Processing Apparatus, Image Processing Method and Recording Medium

1. An image processing system in which an image processing apparatus and a decryption server are interconnected via a network, wherein: the image processing apparatus comprises: a connector that removably connects to a portable recording medium storing: an encryption software application linked to a supplier of the portable recording medium or a supplier of the encryption software application itself; a target file encrypted by the encryption software application; and access information to access a decryption server decrypting the target file encrypted by the encryption software application, the decryption server corresponding to the encryption software application; a reader that reads out the encrypted target file and the access information from the portable recording medium connected to the connector; an accessor that accesses the decryption server corresponding to the encryption software application, on the basis of the access information obtained by the reader; a transmitter that transmits the encrypted target file to the decryption server accessed by the accessor; a receiver that receives the decrypted target file that is returned from the decryption server; and a file processor that processes the decrypted target file received by the receiver, and the decryption server comprises: a receiver that receives the encrypted target file from the image processing apparatus; a decryption executor that decrypts the encrypted target file received by the receiver; and an answer transmitter that returns the target file decrypted by the decryption executor, to the image processing apparatus.

2. The image processing system recited in claim 1 , wherein: there are a plurality of decryption servers and each of them is provided for a portable recording medium provider or an encryption software application provider; and the accessor of the image processing apparatus accesses one of the decryption servers provided for a portable recording medium provider or an encryption software application provider, according to the access information.

3. The image processing system recited in claim 1 , wherein: the decryption server is a single server that is capable of decrypting target files encrypted by a plurality of different encryption software applications; the decryption server further comprises an encryption software identifying portion that identifies the encryption software application having encrypted the file received by the receiver from the image processing apparatus; and the decryption executor decrypts the target file encrypted by the encryption software application identified by the encryption software identifying portion, in a decryption method that is a match for the encryption software application.

4. An image processing apparatus connected to a decryption server via a network, comprising: a connector that removably connects to a portable recording medium storing: an encryption software application linked to a supplier of the portable recording medium or a supplier of the encryption software application itself; a target file encrypted by the encryption software application; and access information to access a decryption server decrypting the target file encrypted by the encryption software application, the decryption server corresponding to the encryption software application; a reader that reads out the encrypted target file and the access information from the portable recording medium connected to the connector; an accessor that accesses the decryption server corresponding to the encryption software application, on the basis of the access information obtained by the reader; a transmitter that transmits the encrypted target file to the decryption server accessed by the accessor; a receiver that receives the decrypted target file that is returned from the decryption server; and a file processor that processes the decrypted target file received by the receiver.

5. The image processing apparatus recited in claim 4 , wherein: there are a plurality of decryption servers and each of them is provided for a portable recording medium provider or an encryption software application provider; and the accessor of the image processing apparatus accesses one of the decryption servers provided for a portable recording medium provider or an encryption software application provider, according to the access information.

6. The image processing apparatus recited in claim 4 , wherein; the decryption server is a single server that is capable of decrypting target files encrypted by a plurality of different encryption software applications; and the accessor of the image processing apparatus accesses this decryption server according to the access information.

7. An image processing method implemented by an image processing system in which an image processing apparatus and a decryption server are interconnected via a network, comprising: the image processing apparatus's: detecting whether or not a portable recording medium is connected to a connector that removably connects thereto, the portable recording medium storing: an encryption software application linked to a supplier of the portable recording medium or a supplier of the encryption software application itself; a target file encrypted by the encryption software application; and access information to access a decryption server decrypting the target file encrypted by the encryption software application, the decryption server corresponding to the encryption software application; reading out the encrypted target file and the access information from the portable recording medium, if detecting that the portable recording medium is connected to the connector; accessing the decryption server corresponding to the encryption software application, on the basis of the obtained access information; transmitting the encrypted target file to the accessed decryption server; receiving the decrypted target file that is returned from the decryption server; and processing the decrypted target file received therefrom, and the decryption server's: receiving the encrypted target file from the image processing apparatus; decrypting the encrypted target file received therefrom; and returning the target file that is decrypted, to the image processing apparatus.

8. The image processing method recited in claim 7 , wherein: the number of the decryption servers is a plural number and each of them is provided for a portable recording medium provider or an encryption software application provider; and the image processing apparatus accesses one of the decryption servers provided for a portable recording medium provider or an encryption software application provider, according to the access information.

9. The image processing method recited in claim 7 , wherein: the decryption server is one server that is capable of decrypting target files encrypted by a plurality of different encryption software applications; the decryption server further identifies the encryption software application having encrypted the file received by the receiver from the image processing apparatus; and the decryption server decrypts the target file encrypted by the identified encryption software application, in a decryption method that is a match for the encryption software application.

10. A non-transitory computer readable recording medium having an image processing program recorded therein to make a computer of an image processing apparatus that is connected to a decryption server via a network, execute: detecting whether or not a portable recording medium is connected to a connector that removably connects thereto, the portable recording medium storing: an encryption software application linked to a supplier of the portable recording medium or a supplier of the encryption software application itself; a target file encrypted by the encryption software application; and access information to access a decryption server decrypting the target file encrypted by the encryption software application, the decryption server corresponding to the encryption software application; reading out the encrypted target file and the access information from the portable recording medium, if detecting that the portable recording medium is connected to the connector; accessing the decryption server corresponding to the encryption software application, on the basis of the obtained access information; transmitting the encrypted target file to the accessed decryption server; receiving the decrypted target file that is returned from the decryption server; and processing the decrypted target file received therefrom.

11. The non-transitory computer readable recording medium recited in claim 10 , wherein: there are a plurality of decryption servers and each of them is provided for a portable recording medium provider or an encryption software application provider, and which image processing program makes the computer further execute: accessing one of the decryption servers provided for a portable recording medium provider or an encryption software application provider, according to the access information.

12. The non-transitory computer readable recording medium recited in claim 10 , wherein: the decryption server is a single server that is capable of decrypting target files encrypted by a plurality of different encryption software applications, and which image processing program makes the computer further execute: accessing this decryption server according to the access information.